SYSTEM AND METHOD FOR LAYER-WISE PROTON BEAM CURRENT VARIATION
First Claim
1. A proton therapy system, the proton therapy system comprising:
- a cyclotron, the cyclotron comprising;
an ion source for producing a proton treatment beam having a beam current;
a plurality of beam path modulators; and
a plurality of beam current modulators,wherein, the proton treatment beam is automatically directed by the plurality of beam path modulators such that at least a portion of the proton treatment beam travels through the plurality of beam current modulators.
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Accused Products
Abstract
Systems and methods are provided to perform efficient, automatic adjustment of cyclotron beam currents within a wide range for multiple treatment layers within the same patient and treatment session. In one embodiment, efficient adjustment is achieved by using beam current attenuation by an electrostatic vertical deflector installed in the inner center of the cyclotron. The beam current may, for example, be adjusted by the high voltage applied to the electrostatic vertical deflector. In front of each treatment the attenuation curve of the vertical deflector is recorded. Based on this attenuation curve, the vertical deflector voltage for the needed beam current of each irradiation layer is interpolated. With this procedure the beam current could be automatically adjusted in minimal time over a wide range while maintaining a high level of precision.
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Citations
30 Claims
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1. A proton therapy system, the proton therapy system comprising:
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a cyclotron, the cyclotron comprising; an ion source for producing a proton treatment beam having a beam current; a plurality of beam path modulators; and a plurality of beam current modulators, wherein, the proton treatment beam is automatically directed by the plurality of beam path modulators such that at least a portion of the proton treatment beam travels through the plurality of beam current modulators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for applying proton therapy comprising:
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generating a beam of protons from an ion source, the beam of protons having a beam current; directing, via a plurality of beam path modulators, the beam of protons through a plurality of beam current modulators; conducting a plurality of beam current measurements by performing a plurality of beam current adjustments; analyzing the plurality of beam current measurements to determine a plurality of settings for the plurality of beam path modulators; and automatically producing a plurality of desired beam currents by adjusting the plurality of beam path modulators to modify the beam current to conform to the plurality of pre-determined configurations. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A cyclotron, comprising:
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a ion source for producing a beam of protons, the beam of protons having a trajectory and a beam current; a plurality of electrostatic vertical deflectors with a corresponding vertical collimator for causing a deflection of a trajectory of the beam of protons; a plurality of phase slits for adjusting a beam current of the beam of protons; a measuring device for measuring the beam current of a beam of protons produced by the ion source and extracted through the plurality of phase slits, wherein, the cyclotron is used to perform a proton beam therapy treatment by automatically applying a plurality of beam currents to a target patient, the plurality of beam currents being generated by deflecting, via the plurality of electrostatic vertical deflectors, the trajectory of the beam of protons through the plurality of the vertical collimators and the plurality of phase slits.
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Specification